US4155962A - Method of removing molded lenses from the mold - Google Patents
Method of removing molded lenses from the mold Download PDFInfo
- Publication number
- US4155962A US4155962A US05/875,857 US87585778A US4155962A US 4155962 A US4155962 A US 4155962A US 87585778 A US87585778 A US 87585778A US 4155962 A US4155962 A US 4155962A
- Authority
- US
- United States
- Prior art keywords
- mold
- lens
- optical surface
- container
- cutting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
- G02B1/041—Lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
- B29C33/48—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling
- B29C33/50—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles with means for collapsing or disassembling elastic or flexible
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
- B29C33/60—Releasing, lubricating or separating agents
- B29C33/62—Releasing, lubricating or separating agents based on polymers or oligomers
- B29C33/64—Silicone
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00019—Production of simple or compound lenses with non-spherical faces, e.g. toric faces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00038—Production of contact lenses
- B29D11/00076—Production of contact lenses enabling passage of fluids, e.g. oxygen, tears, between the area under the lens and the lens exterior
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00413—Production of simple or compound lenses made by moulding between two mould parts which are not in direct contact with one another, e.g. comprising a seal between or on the edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/00432—Auxiliary operations, e.g. machines for filling the moulds
- B29D11/00442—Curing the lens material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00009—Production of simple or compound lenses
- B29D11/0048—Moulds for lenses
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D11/00—Producing optical elements, e.g. lenses or prisms
- B29D11/00932—Combined cutting and grinding thereof
- B29D11/00942—Combined cutting and grinding thereof where the lens material is mounted in a support for mounting onto a cutting device, e.g. a lathe, and where the support is of machinable material, e.g. plastics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
- B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
- B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/009—Shaping techniques involving a cutting or machining operation after shaping
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0011—Combinations of extrusion moulding with other shaping operations combined with compression moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/0002—Condition, form or state of moulded material or of the material to be shaped monomers or prepolymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2823/00—Use of polyalkenes or derivatives thereof as mould material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2877/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as mould material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2011/00—Optical elements, e.g. lenses, prisms
- B29L2011/0016—Lenses
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
- Y10S425/808—Lens mold
Definitions
- plastic materials for making optical lenses has increased rapidly for the past ten years. This is due to the availability of better plastic materials and the physical advantages of the plastic resins for specific application such as ophthalmic lenses.
- the technology for the production of high quality plastic lenses has not kept pace with the material supply industry. It is important to advance both areas if the full potential is to be realized.
- Plastic lenses offer many advantages over glass lenses. They are much lighter in weight and resist breakage. The cost of making high quality lenses has been high, due to the problems caused by the shrinkage of the monomer when polymerized, which often breaks the expensive molds.
- the current lens molds are fabricated from steel or glass, each mold is individually ground and polished to the required specifications. To achieve accurate reproduction of the bifocal and lenticular molds is most difficult and expensive. This new process makes possible exact reproductions and has many other distinct advantages which will become apparent from the following disclosure.
- An object is to provide a process for making inexpensive molds which may be made to identical specifications.
- Another object is to provide a process where by standard masters may be used to produce a large quantity of replica molds.
- FIG. 1 shows the sleeve, steel mold and resinous material.
- FIG. 2 shows the resinous mold containing the liquid monomers with cover.
- FIG. 3 shows the polymerized lens material with one optical surface molded on the resinous mold.
- FIG. 4 shows the lens with the second optical surface cut and in the resinous mold.
- the lenses are made as follows:
- a master positive mold having the curvature required on the finished lens is made from glass, stainless steel or other materials which withstand the molding pressures and temperature. Materials which may be electroplated or plated by vacuum disposition have also been used.
- the master mold 1 FIG. 1 is placed in a sleeve 4 FIG. 1, a molding grade of a resinous material such a polyimide, polycarbonate, polymethylpentene, polyethylene, polypropylene, nylon or other molding material is placed in the sleeve 4 FIG. 1.
- the sleeve and it's contents are heated to the softening point of the molding material and pressure is applied to form the lens mold 3 FIG. 1.
- the sides of the master mold 1 FIG. 1, have been cut to a smaller diameter to provide the opening 5 FIG. 1.
- When sufficient heat and pressure have been applied to molding compound 3 will fill the area around the positive mold 1 forming a cup-like cavity with a curved optical surface 2 FIG. 1, at the bottom.
- Ultraviolet light, microwave energy or heat may be used to speed the polymerization process.
- Thermosetting and crosslinked hard materials may be used to produce lenses which are rigid and dimensionally stable and could not be made by injection or compression molding. This process is also suitable for the production of soft contact lenses which cannot be made by compression of injection molding techniques.
- the mold 3 FIG. 3 may be placed in a suitable lathe and curvature 9 FIG. 3 cut and polished.
- the finished lens 6 FIG. 4 having the molded concave surface 2 and the convex curvature 9 which was cut and polished without being removed from the disposable mold 3 FIG. 4, which acted as the holding device during the cutting and polishing of curve 9 FIG. 4.
- the cup like device has served as a container for the monomer 6 FIG. 2, provided the molded optical surface which for contact lenses may be aspheric or may be composed of two or more spherical segments providing the required optical zone and peripheral curves.
- the cup 3 FIG. 3 also serves as the holding block to facilitate cutting to the required thickness.
- the thickness of the cup bottom may be measured before adding the liquid monomers and measurements may be taken during the cutting operation and the lens thickness determined by subtracting the thickness of the cup bottom.
- the cup 3 FIG. 3, also serves as a holding fixture during the polishing operation.
- the lens is supported by the optical surface present on the mold, therefore the lens material must adhere strongly to the supporting mold in order to withstand the forces of cutting and polishing. This adhesion may be controlled by:
- the lens is removed by sharply flexing the holding fixture this is accomplished by applying pressure at points 11 and 12 FIG. 4, collapsing opening 10 FIG. 4, and stretching surface 2 FIG. 4. Separating the finished optical lens 6 FIG. 4, from it's support 3 FIG. 4.
Abstract
Description
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US05/875,857 US4155962A (en) | 1977-05-25 | 1978-02-07 | Method of removing molded lenses from the mold |
GB7901070A GB2014896B (en) | 1978-02-07 | 1979-01-11 | Method of removing molded lenses from the mould |
CA000320134A CA1119763A (en) | 1978-02-07 | 1979-01-23 | Method of removing molded lenses from the mold |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US79338877A | 1977-05-25 | 1977-05-25 | |
US05/875,857 US4155962A (en) | 1977-05-25 | 1978-02-07 | Method of removing molded lenses from the mold |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US79338877A Continuation-In-Part | 1977-05-25 | 1977-05-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US4155962A true US4155962A (en) | 1979-05-22 |
Family
ID=27121383
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US05/875,857 Expired - Lifetime US4155962A (en) | 1977-05-25 | 1978-02-07 | Method of removing molded lenses from the mold |
Country Status (1)
Country | Link |
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US (1) | US4155962A (en) |
Cited By (34)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4255364A (en) * | 1977-12-12 | 1981-03-10 | Talbert John W | Large mirror replication process |
US4307046A (en) * | 1979-07-16 | 1981-12-22 | Neefe Charles W | Method of laser machining contact lenses |
US4457880A (en) * | 1983-02-15 | 1984-07-03 | Neefe Charles W | Method of making contact lens blanks |
US4478770A (en) * | 1981-05-18 | 1984-10-23 | Yeda Research And Development Company, Ltd. | Production of contact lenses |
EP0143253A1 (en) * | 1983-09-27 | 1985-06-05 | Barnes-Hind, Inc. | Lens casting mold and process for using same in making an optical lens |
US4578230A (en) * | 1982-09-13 | 1986-03-25 | Neefe Charles W | Method of contouring the edge of contact lenses |
US4686798A (en) * | 1985-06-21 | 1987-08-18 | Sola U.S.A. Inc. | Optical blank carrier for lathing lenses and process therefor |
US4749530A (en) * | 1986-11-12 | 1988-06-07 | Kunzler Wilhelm F | Mold for and method of making contact and intraocular lenses |
US4820038A (en) * | 1986-08-14 | 1989-04-11 | Coopervision, Inc. | Hydrogel contact lens |
US4906422A (en) * | 1988-10-17 | 1990-03-06 | Corning Incorporated | Method of producing moulds for organic polymer multifocal lenses |
US4909969A (en) * | 1989-08-23 | 1990-03-20 | Wood Kenneth E | Method and apparatus for removing a contact lens from a plastic mold |
US5110278A (en) * | 1990-11-30 | 1992-05-05 | Pilkington Visioncare, Inc. | Injection molding apparatus for producing a toric lens casting mold arbor |
US5164228A (en) * | 1991-05-20 | 1992-11-17 | Bmc Industries, Inc. | Method of applying scratch-resistant coatings to plastic ophthalmic lenses |
US5264160A (en) * | 1991-04-30 | 1993-11-23 | Canon Kabushiki Kaisha | Method of molding optical elements |
US5290488A (en) * | 1991-04-30 | 1994-03-01 | Canon Kabushiki Kaisha | Method for molding optical elements |
US5292457A (en) * | 1991-04-30 | 1994-03-08 | Canon Kabushiki Kaisha | Method for molding optical elements |
EP0588660A1 (en) * | 1992-09-18 | 1994-03-23 | JOHNSON & JOHNSON VISION PRODUCTS, INC. | Laser assisted demolding of ophthalmic lenses |
US5361168A (en) * | 1991-04-30 | 1994-11-01 | Canon Kabushiki Kaisha | Lens element and lens barrel |
US5455641A (en) * | 1992-04-23 | 1995-10-03 | Ciba-Geigy Corporation | Soft contact lens having toric rear face and rotationally symmetrical front face |
US6033603A (en) * | 1996-11-06 | 2000-03-07 | Bausch & Lomb Incorporated | Method and apparatus for separating contact lens mold sections |
WO2002014058A2 (en) * | 2000-08-16 | 2002-02-21 | California Institute Of Technology | Solid immersion lens structures and methods for producing solid immersion lens structures |
US20020185763A1 (en) * | 2001-04-06 | 2002-12-12 | Pegram Stephen C. | Ir-emitter heating device and method for demolding lenses |
US20050052754A1 (en) * | 2003-08-11 | 2005-03-10 | California Institute Of Technology | Microfabricated rubber microscope using soft solid immersion lenses |
US20050062179A1 (en) * | 2003-09-22 | 2005-03-24 | Sanjay Rastogi | Automated method for transferring lenses in a hydrated state from molds to receivers |
US20050168828A1 (en) * | 1998-11-12 | 2005-08-04 | California Institute Of Technology | Microlicensing particles and applications |
US20060006067A1 (en) * | 2004-06-07 | 2006-01-12 | Fluidigm Corporation | Optical lens system and method for microfluidic devices |
US20070037897A1 (en) * | 2005-08-12 | 2007-02-15 | Guigui Wang | Method for making contact lenses |
US20080137584A1 (en) * | 2006-12-08 | 2008-06-12 | Samsung Electronics Co., Ltd. | Apparatus and method for selecting frame structure in multihop relay broadband wireless access communication system |
EP2075633A1 (en) * | 2007-12-28 | 2009-07-01 | Nederlandse Organisatie voor toegepast- natuurwetenschappelijk onderzoek TNO | Method of releasing a plate made of brittle material, assembly of a support and peeling arrangement, and peeling arrangement |
WO2009084956A1 (en) * | 2007-12-28 | 2009-07-09 | Nederlandse Organisatie Voor Toegepast Natuurwetenschappelijk Onderzoek Tno | Method of releasing an adaptive optical plate, assembly of a support and peeling arrangement, and peeling arrangement |
EP3017938A1 (en) * | 2014-11-06 | 2016-05-11 | Carl Zeiss Vision International GmbH | Process for preparing spectacle lenses |
US9623614B2 (en) | 2010-11-10 | 2017-04-18 | Novartis Ag | Method for making contact lenses |
WO2017194095A1 (en) * | 2016-05-10 | 2017-11-16 | Carl Zeiss Vision International Gmbh | Mold and process for preparing spectacle lenses |
DE102018213423A1 (en) * | 2018-08-09 | 2020-02-13 | Carl Zeiss Vision International Gmbh | Process for the production of spectacle lenses or spectacle lens blanks and radial tool for the manufacture of spectacle lenses or spectacle lens blanks |
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US1378064A (en) * | 1920-10-28 | 1921-05-17 | Giuseppe E Terranova | Process of forming molds for dentists' use |
US3353220A (en) * | 1964-01-28 | 1967-11-21 | Lenoble Raymond | Flexible mold for molding a frame onto a pane |
US3841598A (en) * | 1972-09-19 | 1974-10-15 | B Grucza | A mold for casting a hydrophilic contact lens blank |
US3876734A (en) * | 1971-08-09 | 1975-04-08 | Philips Corp | Method for the manufacture of optical elements |
DE2518905A1 (en) * | 1974-05-06 | 1975-11-20 | Bausch & Lomb | METHOD AND DEVICE FOR MANUFACTURING OPTICAL LENSES |
US3931373A (en) * | 1971-12-21 | 1976-01-06 | J. O. Beattie Research Company | Replication processes for producing plastic optical components |
US4027845A (en) * | 1975-04-28 | 1977-06-07 | Precision Flexmold, Inc. | Flexible mold including rigid encapsulated mandrel |
-
1978
- 1978-02-07 US US05/875,857 patent/US4155962A/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1378064A (en) * | 1920-10-28 | 1921-05-17 | Giuseppe E Terranova | Process of forming molds for dentists' use |
US3353220A (en) * | 1964-01-28 | 1967-11-21 | Lenoble Raymond | Flexible mold for molding a frame onto a pane |
US3876734A (en) * | 1971-08-09 | 1975-04-08 | Philips Corp | Method for the manufacture of optical elements |
US3931373A (en) * | 1971-12-21 | 1976-01-06 | J. O. Beattie Research Company | Replication processes for producing plastic optical components |
US3841598A (en) * | 1972-09-19 | 1974-10-15 | B Grucza | A mold for casting a hydrophilic contact lens blank |
DE2518905A1 (en) * | 1974-05-06 | 1975-11-20 | Bausch & Lomb | METHOD AND DEVICE FOR MANUFACTURING OPTICAL LENSES |
US4027845A (en) * | 1975-04-28 | 1977-06-07 | Precision Flexmold, Inc. | Flexible mold including rigid encapsulated mandrel |
Cited By (52)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4255364A (en) * | 1977-12-12 | 1981-03-10 | Talbert John W | Large mirror replication process |
US4307046A (en) * | 1979-07-16 | 1981-12-22 | Neefe Charles W | Method of laser machining contact lenses |
US4478770A (en) * | 1981-05-18 | 1984-10-23 | Yeda Research And Development Company, Ltd. | Production of contact lenses |
US4578230A (en) * | 1982-09-13 | 1986-03-25 | Neefe Charles W | Method of contouring the edge of contact lenses |
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